Piazza is a free, online Q&A platform built to replace less effective discussion boards, email lists, and newsgroups commonly adopted in classrooms. It was made popular by widespread use at Stanford, Harvard, Princeton, Berkeley, MIT, and more. Currently, there are over 17,000 instructors and 500,000 students using Piazza in their classes everyday. Piazza saves you time and improves your interactions with students. It's completely free and only takes a few minutes to set up. Visit www.piazza.com to get started today.